If you're as anxious as I am to drive one of these EVs to help determine to either submit or keep your pre-order deposit, this will come as welcomed news.   Here's an excerpt from a Teslarati article dated May 3rd: 

"Rivian appears to be setting the stage for the introduction of a test drive program for its first two vehicles, the R1T pickup truck and the R1S SUV. Such a program will bode well for Rivian, as it will give potential customers a chance to experience the company’s vehicles firsthand. The first hints of a potential Rivian test drive program came in the form of a Reddit post on the r/Rivian subreddit. One of the online community’s members, u/Knight_of_r_noo, attended the New York Auto Show, where he was reportedly able to speak with Rivian’s team, including CEO RJ Scaringe. According to the electric truck enthusiast, Rivian is planning on doing a roadshow around the United States to let people experience the R1T and R1S. Details of the program are reportedly being ironed out by the electric truck maker. Yet another hint at Rivian’s test drive program came in the form of a job listing that the company recently posted online. ..."  Not to get ahead of myself but the two next obvious questions are when and where.   Source: https://www.teslarati.com/rivian-r1t-r1s-test-drives/